By Consuelo M. Beck-Sague
Because its emergence within the usa within the Nineteen Eighties, AIDS and its precursor, HIV, has been a starting to be epidemic. even if a lot is referred to now concerning the virus, scientists haven't begun to find a healing or a vaccine. This booklet explores the biology and transmission of the virus, in addition to the heritage and epidemiology.
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Additional info for HIV Aids (Deadly Diseases and Epidemics)
4 The liver in the fetus makes stem cells, from which all the cells of the immune system descend. In babies and young children, immune tissues such as adenoids and the thymus are very prominent. This figure illustrates the different immune cells that arise from stem cells. The Virus CD8+ T Cells T cells that lose their CD4 in the thymus and keep only their CD8 are called CD8+ T cells. Cells that have CD8 on their surfaces make cytokines that slow down inflammation once invaders have been controlled.
1: The Retroviruses, Subfamily Lentiviruses HOST VIRUS DISEASE CAUSED Cat Feline IV Feline AIDS (mild disease) Horse Equine infectious anemia V Anemia African Green Monkey Simian IV (SIV)agm Simian (“monkey”) AIDS Rhesus macaque SIVmac Simian (“monkey”) AIDS Sootey mangabey SIVsm Simian (“monkey”) AIDS Chimpanzee SIVcpz Simian (“monkey”) AIDS Males and females HIV-1, identical to SIVcpz AIDS Males and females HIV-2, identical to SIVsm Less severe AIDS NON-PRIMATES NONHUMAN PRIMATES HUMANS body.
5. Viral DNA enters the nucleus, and viral integrase enzyme splices the viral DNA into the T cell’s DNA. 6. The cell’s nucleus uses the viral DNA inside of its own DNA as a template for making RNA for a new virus, and for making big, inactive proteins for new viruses. 7, 8. The new viruses are trimmed into individual active proteins by protease enzymes. 9. The new virus particle buds out of the cell, assembled, just taking with it a tiny bit of cell membrane for itself. It does not damage the cell, which stays busy making more HIV.
HIV Aids (Deadly Diseases and Epidemics) by Consuelo M. Beck-Sague